Loom-shuttle.



I J. C. SHAMBOW & G. H. GOLDSMITH.

LOOM SHUTTLE.

APPLICATION FILED DEC. 12, 1917.

Patented Aug. 20, 1918.

Mme

GOLDSMITH, OF NOONSOCKET, RHODE ISLAND,

JOHN C. SHAIVIBOW' AND GEORGE E.

ASSIGNORS T0 SHAMBOW SHUTTLE COMPANY, or woonsocxnnnnonn ISLAND,

A CORPORATION OF RHODE ISLAND.

LOOM-SH'U'I'TLE.

Specification of Letters Fatent.

Application filed December 12, 1917. Serial No. 206,719.

To all whom it may concern:

Be it known that we, J OHN G. SHAMBOW and GEORGE H. GOLDSMITH, citizensof the United States, residing at Woonsocket, in the county ofProvidence and State of Rhode Island, have invented a new and use fulImprovement in Loom Shuttles, of which the following is a specification.

This invention relates to certain new and useful improvements in a loomshuttle particularly adapted for heavy work purposes, such as theweaving of bagging, and it seeks to provide improved means that willefliciently retain the yarn, which has been previously stripped from thebobbin, and placed without any central support in the yarn receivingchamber of the shuttle both against displacement and against bein entersthe box.

Further, the invention aims to provide a novel and efficient tensioningdevice for the feeding yarn which will readily permit the passage ofirregularities in the yarn, such as knots and bunches.

The invention further resides in the features of construction and thearrangements and combinations of parts as will be hereinafter describedin detail and claimed in a succinct manner, reference being had to theaccompanying drawing wherein- Figure 1 is a fragmentary top plan view ofa shuttle embodying the present inven tion, and

Fig. 2 is a side elevation thereof broken away to elucidate theconstruction of the yarn tensioning device. 7

Referring more in detail to the drawing, the numeral 1 indicates theshuttle body double-pointed, as usual, and formed with the yarnreceiving cavity or chamber 2 which has its side walls serrated orprovided with a series of saw toothed steps or grooves 3 forinterlocking engagement with the cop or cone of yarn 4. In shuttles ofthis nature, that is, shuttles particularly adapted for heavy work, theyarn is stripped from the bobbin and placed in the shuttle chamberwithout any central support. The natural'action of this cone of yarn,therefore, would be to expand into at least one of the grooves of thesaw tooth formation and by such interlocking relation hold the yarn injammed or driven forward when the shuttle place against being driven orjammed forwardly when the shuttle enters the box.

To prevent the yarn from lifting out, of

the chamber, a strip of fabric 5 is secured at one of said chambersbeneath a clamp plate 6 by fasteners 7, the opposite end of the stripcarrying a yoke 8 of truncated design which a pair of fabric 5 shuttlebear on sition.

A tensioning device is arranged in the cavity in advance of the hooks 9and comprises a revoluble ring 10 which is held in contact with a leafspring 11 by means of its journal bearing on the eccentric 12, thelatter having a. head countersunk in the ring for retaining the latterthereon. A headed screw bolt or pin 13 is eccentrically passed throughthe eccentric and into a base plate 14 which also carries the spring 11and the hooks 9, the head of said screw bolt being countersunk in theeccentric, as depicted in Fig. 2. The head of said eccentric is formedwith a groove or seat 15 by which a screw driver or other suitable toolmay be applied for adjusting the eccentric and thereby vary the degreeof tension or pressure exerted by the spring. One end of this spring isfixed as at 16 so that the leaf extends tangentially to the rotatablering.

In practice, the yarn having been placed in the shuttle, is led betweenthe pins through the tensioning device and out through the side opening17 formed in the shuttle. Owing to the irregularities in the yarn, it isessential that the tension be capable of giving to permit the passage ofsuch irregularities as knots and bunches. In this instance, the ring 10would revolve about the eccentric and thereby permit free passage of theyarn while at the same. time maintaining a tension by reason of thespring.

Obviously, the insertion or refilling of the shuttle is facilitatedsince the free end of the fabric strip may. readily be unhooked ordisengaged in an expeditious manner to provide ready access to thechamber.

Furthermore, it will be noticed that the spring 11 inclines in thedirection of travel pins or hooks 9. Consequently the which extends fromone end of the chamber to the opposite'end, will top of the yarn andhold it in po- Patented Aug. 2d, 3918.

is adapted to detachably engage over 0f the yarn and by adjusting theeccentric the degree of tension may be adjusted to a ninety.

Having thus ClQSCTibGd our invention, What We claim and desire t0 securebv Letters Patent is-- 1. in a shuttle a body having a chamber and atensioning' device for the yarn as it leaves the chain 3e13 including arevolnble eccentric adjustable guide and a spring plate bearingthereagainst.

2. In a shuttle, a body having a chamber and a 'teneioning device forthe yarn as it leaves the chamber, including a revoluble ring aneccentric support theic or, and spying means for pressing against thering.

8. In a shuttle, a body having a chamber, and a tensioning device forthe yarn as it leaves the chamber, including a base plate, an eccentricrotat-ably adjustable on the plate e ring revehibly CZUTlGCl by theeecentric and a leaf tension spring secured at one end to the plate andextending substantially tangential t0 the ring.

l. in a shuttle, a body having a chamber, and a tensicning device forthe yarn as it leaves the clnn'nbei including base plate, an eccentricrotatably adjustable on the plate, a ring i'evolubiy carried by theeceentrie, and a leaf tension spring secured at one end to the plate andextending substantially tangential t0 the ring, the upper end 0? theeccentric having means by which it ma be turned for adjustment.

In testimony whereof We have signed our names to this specification inthe preeenee of two subscribing Witnesses.

JOHN C. SHAMBGVV. GEQRGE H. GOLDSMITH. llitnesses l feline bl. Kine,

OH}? EIAGILL.

